If this is about adoption....I have 4 friends with adopted children. None of them have renamed their children, one calls her Dd a shortened version of her birth name but the others use the same names which are quite distinctive. Is that what you mean?

I know of a child who was registered with one name (like George) but was always known as a completely unrelated name (like Stanley). He was only ever called Stanley at home, school, clubs etc. Apparently there was a mistake when registering him but I suspect that's not what you mean by 'randomly'.

"a word that is NOT EVEN A NAME" - I hope you don't mean they are habitually calling the child a pet name like sausage or pickle or sweetiepie or treacle or something, and you are offended about them not using the name??

I will try and explain, sorry for being confusing I'm rather sleep deprived

I have a baby ( well I have more than one but in this case I'm referring to the youngest one whose 3 weeks old) this baby has an actual name one chosen by her dad and I. Its a real proper name and it obviously is on her birth certificate.

My blasted mother has randomly decided that she is only to be referred to as baby boo.

For back ground not one other child in the family has a nickname,this has never happened before she has always been quite proper about using people's names not shortening or anything like that and has always hated incorporating baby or junior or things like that into names,

But all of a sudden she has decided that this baby is called baby boo and any reference to her actual name is ignored.

I think it's ok if she wants to have a pet name for the baby. But, I've been known to refer to my toddler "boo boo," "sugar doodle," "sweet potato," "pookie," and "darling." So I may not be the best one to offer an opinion.